Contributors: Evolution et Diversité Biologique (EDB); Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3); Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS); Institut des Sciences de l'Evolution de Montpellier (UMR ISEM); Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM); Universidade de São Paulo = University of São Paulo (USP); Instituto Nacional de Pesquisas da Amazônia = National Institute of Amazonian Research (INPA); Federal University of Amazonas; Trinity University; Instituto de Investigación de Recursos Biológicos Alexander von Humboldt = Alexander von Humboldt Biological Resources Research Institute; Muséum national d'Histoire naturelle (MNHN); Vrije Universiteit Brussel Bruxelles (VUB); University of Lódź = Uniwersytet Łódzki; Senckenberg Natural History Collections, State Museum of Zoology, Dresden; French/Brazilian GUYAMAZON program action (IRD, CNRS, CTG, CIRAD and Brazilian Fundação de Amparo Pesquisa do Estado do Amazonas-FAPEAM 062.00962/2018); Fonds voor Wetenschappelijk Onderzoek (FWO12A7614N and FWO12A7617N); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), the Fundação de Amparo Pesquisa do Estado de São Paulo (FAPESP grant numbers: 2003/10335-8, 2011/50146-6; NSF-FAPESP Dimensions of Biodiversity Program grant numbers: BIOTA 2013/50297-0, NSF-DEB 1343578 ); CNPq (productivity fellowship: 311504/2020-5); ANR-10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010); ANR-10-LABX-0041,TULIP,Towards a Unified theory of biotic Interactions: the roLe of environmental(2010); ANR-11-INBS-0001,ANAEE-FR,ANAEE-Services(2011)
نبذة مختصرة : International audience ; The genus Pipa is a species-poor clade of Neotropical frogs and one of the most bizarre-looking due to many highly derived anatomical traits related to their fully aquatic lifestyle. With their African relatives, they form the Pipidae family, which has attracted much attention, especially regarding its anatomy, reproductive biology, paleontology and biogeography. However, the actual diversity and phylogenetic relationships within Pipa remain poorly understood, and thus so do their historical biogeography and the evolution of striking features, such as the absence of teeth and endotrophy in some species. Using short mtDNA sequences across the distribution of the genus, we identified 15 main lineages (Operational Taxonomic Units - OTUs). This more than doubles the number of the currently seven valid nominal species. Several closely related OTUs do not share nuDNA alleles, confirming species divergence. Time-calibrated phylogenies obtained from mitogenomes and from 10 nuclear loci provide highly similar topologies but strikingly distinct node ages for Pipa. High dN/dS ratios and the variation of substitution rates across the trees suggest a strong effect of saturation on fast evolving positions of mtDNA, producing a substantially shorter stem branch of Pipa. Focusing on the nuDNA topology, we inferred an early Neogene Amazonian origin of the diversification of Pipa, with an initial split between the Guiana-Brazilian Shields and Western Amazonia, a pattern observed in many other co-distributed groups. All the western species are edentate, suggesting a single loss in the genus. Each of these groups diversified further out of Amazonia, toward the Atlantic Forest and toward trans-Andean forests, respectively. These events are concomitant with paleogeographic changes and match patterns observed in other co-distributed taxonomic groups. The two Amazonian lineages have probably independently acquired endotrophic larval development.
Processing Request
No Comments.